1/2 Strength Feeding for seedling in soil

Yes, very good idea! With the healthy soil mix you have made, I would suggest waiting until your plant has 8-10 nodes before starting with feeding, there will be enough goodness in your soil mix to get her there without any extras just yet. I would also suggest starting with quarter strength nutrients to begin with and see how that goes before moving to half strength. Remember, it is very easy to correct a slight under feeding and very, very hard trying to rescue a badly burnt over fed plant. Your baby plant will be very happy with baby feeding at first, before moving onto teenage feeding. Good luck and happy growing! Hope this helps,..... Organoman.